1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 ///////////////////////////////////////////////////////
20 // Reconstructed track hit
26 ///////////////////////////////////////////////////////
28 #include "AliMUONHitForRec.h"
29 #include "AliMUONTrackHit.h"
31 ClassImp(AliMUONTrackHit) // Class implementation in ROOT context
33 //__________________________________________________________________________
34 AliMUONTrackHit::AliMUONTrackHit(AliMUONHitForRec* Hit)
36 // Constructor from the HitForRec pointed to by "Hit"
37 fHitForRecPtr = Hit; // pointer to HitForRec
38 // links from/to HitForRec
39 if (Hit->GetNTrackHits() == 0) {
40 fPrevTrackHitWithSameHitForRec = NULL;
41 Hit->SetFirstTrackHitPtr(this);
44 fPrevTrackHitWithSameHitForRec = Hit->GetLastTrackHitPtr();
45 fNextTrackHitWithSameHitForRec = NULL;
47 Hit->SetLastTrackHitPtr(this);
48 fNextTrackHitWithSameHitForRec = NULL;
49 Hit->SetNTrackHits(Hit->GetNTrackHits() + 1);
52 //__________________________________________________________________________
53 AliMUONTrackHit::AliMUONTrackHit (const AliMUONTrackHit& MUONTrackHit):TObject(MUONTrackHit)
55 // Dummy copy constructor
58 //__________________________________________________________________________
59 AliMUONTrackHit & AliMUONTrackHit::operator=(const AliMUONTrackHit& /*MUONTrackHit*/)
61 // Dummy assignment operator
66 //__________________________________________________________________________
67 AliMUONTrackHit::~AliMUONTrackHit()
70 // Update links between HitForRec's and TrackHit's
71 // connected to the current TrackHit being removed.
72 AliMUONHitForRec *hit = fHitForRecPtr; // pointer to HitForRec
73 // remove current TrackHit in HitForRec links
74 if (this == hit->GetFirstTrackHitPtr())
75 hit->SetFirstTrackHitPtr(fNextTrackHitWithSameHitForRec); // if first
76 if (this == hit->GetLastTrackHitPtr())
77 hit->SetLastTrackHitPtr(fPrevTrackHitWithSameHitForRec); // if last
78 hit->SetNTrackHits(hit->GetNTrackHits() - 1); // decrement NTrackHits of hit
79 // update link to next TrackHit of previous TrackHit
80 if (fPrevTrackHitWithSameHitForRec != NULL)
81 fPrevTrackHitWithSameHitForRec->
82 SetNextTrackHitWithSameHitForRec(fNextTrackHitWithSameHitForRec);
83 // update link to previous TrackHit of next TrackHit
84 if (fNextTrackHitWithSameHitForRec)
85 fNextTrackHitWithSameHitForRec->
86 SetPrevTrackHitWithSameHitForRec(fPrevTrackHitWithSameHitForRec);
87 // to be checked thoroughly !!!!
88 // with Root counter of AliMUONTrackHit objects,
89 // with loop over all these links after the update
92 //__________________________________________________________________________
93 Int_t AliMUONTrackHit::Compare(const TObject* TrackHit) const
95 // "Compare" function to sort with increasing Z.
96 // Returns -1 (0, +1) if Z of current TrackHit
97 // is smaller than (equal to, larger than) Z of TrackHit
98 if (fHitForRecPtr->GetZ() <
99 ((AliMUONTrackHit*)TrackHit)->fHitForRecPtr->GetZ()) return(-1);
100 else if (fHitForRecPtr->GetZ() ==
101 ((AliMUONTrackHit*)TrackHit)->fHitForRecPtr->GetZ()) return( 0);